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Refactor JSONRenderer slightly for easier overriding

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This commit is contained in:
Tom Christie 2014-08-11 16:20:27 +01:00
parent c6326d0a67
commit 09c53bbac9
1 changed files with 23 additions and 18 deletions
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41
rest_framework/renderers.py
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@ -54,32 +54,37 @@ class JSONRenderer(BaseRenderer):
format = 'json' format = 'json'
encoder_class = encoders.JSONEncoder encoder_class = encoders.JSONEncoder
ensure_ascii = True ensure_ascii = True
charset = None
# JSON is a binary encoding, that can be encoded as utf-8, utf-16 or utf-32. # We don't set a charset because JSON is a binary encoding,
# that can be encoded as utf-8, utf-16 or utf-32.
# See: http://www.ietf.org/rfc/rfc4627.txt # See: http://www.ietf.org/rfc/rfc4627.txt
# Also: http://lucumr.pocoo.org/2013/7/19/application-mimetypes-and-encodings/ # Also: http://lucumr.pocoo.org/2013/7/19/application-mimetypes-and-encodings/
charset = None
def render(self, data, accepted_media_type=None, renderer_context=None): def get_indent(self, accepted_media_type, renderer_context):
"""
Render `data` into JSON.
"""
if data is None:
return bytes()
# If 'indent' is provided in the context, then pretty print the result.
# E.g. If we're being called by the BrowsableAPIRenderer.
renderer_context = renderer_context or {}
indent = renderer_context.get('indent', None)
if accepted_media_type: if accepted_media_type:
# If the media type looks like 'application/json; indent=4', # If the media type looks like 'application/json; indent=4',
# then pretty print the result. # then pretty print the result.
base_media_type, params = parse_header(accepted_media_type.encode('ascii')) base_media_type, params = parse_header(accepted_media_type.encode('ascii'))
indent = params.get('indent', indent)
try: try:
indent = max(min(int(indent), 8), 0) return max(min(int(params['indent']), 8), 0)
except (ValueError, TypeError): except (KeyError, ValueError, TypeError):
indent = None pass
# If 'indent' is provided in the context, then pretty print the result.
# E.g. If we're being called by the BrowsableAPIRenderer.
return renderer_context.get('indent', None)
def render(self, data, accepted_media_type=None, renderer_context=None):
"""
Render `data` into JSON, returning a bytestring.
"""
if data is None:
return bytes()
renderer_context = renderer_context or {}
indent = self.get_indent(accepted_media_type, renderer_context)
ret = json.dumps(data, cls=self.encoder_class, ret = json.dumps(data, cls=self.encoder_class,
indent=indent, ensure_ascii=self.ensure_ascii) indent=indent, ensure_ascii=self.ensure_ascii)